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Changes in 1.8.1:
+* Changes to Scheme functions and syntax
+
+** A one-dimenisonal array can now be 'equal?' to a vector.
+** Structures, records, and SRFI-9 records can now be compared with `equal?'.
+
* Bug fixes.
** array-set! with bit vector.
** string<? and friends follow char<? etc order on 8-bit chars.